CN105908018B - Composite thermal spraying powder and preparation method thereof - Google Patents
Composite thermal spraying powder and preparation method thereof Download PDFInfo
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- CN105908018B CN105908018B CN201610319105.2A CN201610319105A CN105908018B CN 105908018 B CN105908018 B CN 105908018B CN 201610319105 A CN201610319105 A CN 201610319105A CN 105908018 B CN105908018 B CN 105908018B
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- 239000000843 powder Substances 0.000 title claims abstract description 72
- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 239000002131 composite material Substances 0.000 title claims abstract description 17
- 238000007751 thermal spraying Methods 0.000 title abstract description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 40
- 229910003470 tongbaite Inorganic materials 0.000 claims abstract description 35
- UFGZSIPAQKLCGR-UHFFFAOYSA-N chromium carbide Chemical compound [Cr]#C[Cr]C#[Cr] UFGZSIPAQKLCGR-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000011651 chromium Substances 0.000 claims abstract description 28
- 238000011065 in-situ storage Methods 0.000 claims abstract description 28
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052796 boron Inorganic materials 0.000 claims abstract description 14
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 11
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 11
- 239000001301 oxygen Substances 0.000 claims abstract description 11
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 8
- 239000002245 particle Substances 0.000 claims abstract description 8
- 239000007921 spray Substances 0.000 claims description 35
- 239000000956 alloy Substances 0.000 claims description 34
- 229910045601 alloy Inorganic materials 0.000 claims description 33
- 238000000576 coating method Methods 0.000 claims description 28
- 239000011248 coating agent Substances 0.000 claims description 24
- 239000002994 raw material Substances 0.000 claims description 19
- 150000001875 compounds Chemical class 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 17
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 16
- 238000000889 atomisation Methods 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 15
- 238000005507 spraying Methods 0.000 claims description 11
- 239000004411 aluminium Substances 0.000 claims description 9
- 229910052786 argon Inorganic materials 0.000 claims description 8
- 238000010286 high velocity air fuel Methods 0.000 claims description 8
- 239000011261 inert gas Substances 0.000 claims description 8
- 238000002844 melting Methods 0.000 claims description 7
- 230000008018 melting Effects 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 6
- 230000006698 induction Effects 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 229910000838 Al alloy Inorganic materials 0.000 claims description 5
- 239000003350 kerosene Substances 0.000 claims description 5
- 238000007670 refining Methods 0.000 claims description 5
- 238000002791 soaking Methods 0.000 claims description 5
- 238000010792 warming Methods 0.000 claims description 5
- 229910000521 B alloy Inorganic materials 0.000 claims description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 3
- 238000013019 agitation Methods 0.000 claims description 3
- NUEWEVRJMWXXFB-UHFFFAOYSA-N chromium(iii) boride Chemical compound [Cr]=[B] NUEWEVRJMWXXFB-UHFFFAOYSA-N 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims description 3
- 238000009689 gas atomisation Methods 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 238000007873 sieving Methods 0.000 claims description 3
- 238000007711 solidification Methods 0.000 claims description 3
- 230000008023 solidification Effects 0.000 claims description 3
- 230000002708 enhancing effect Effects 0.000 claims description 2
- 238000001556 precipitation Methods 0.000 abstract 1
- 239000000919 ceramic Substances 0.000 description 13
- 238000005260 corrosion Methods 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 4
- 229910001120 nichrome Inorganic materials 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 239000002905 metal composite material Substances 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
- 229910001060 Gray iron Inorganic materials 0.000 description 1
- 229910001005 Ni3Al Inorganic materials 0.000 description 1
- 229910009043 WC-Co Inorganic materials 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000013528 metallic particle Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000007750 plasma spraying Methods 0.000 description 1
- 238000009700 powder processing Methods 0.000 description 1
- 238000010334 sieve classification Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/058—Alloys based on nickel or cobalt based on nickel with chromium without Mo and W
-
- B22F1/0003—
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/023—Alloys based on nickel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
- C22C27/06—Alloys based on chromium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
- B22F2009/0848—Melting process before atomisation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
- B22F2009/088—Fluid nozzles, e.g. angle, distance
Abstract
The invention discloses a composite thermal spraying powder and a preparation method thereof, wherein the powder comprises the following main components: 2-7 wt.% of aluminum (Al), 40-75 wt.% of chromium (Cr), 0.1-0.3 wt.% of boron (B), 3-8 wt.% of carbon (C), and the balance of nickel (Ni); and the particle size of the powder is: 5-125 μm, and the main particle size is 15-75 μm; the main particle size means that more than 60% of powder in the particle size range is contained. The powder has high sphericity, uniform components, low oxygen content, controllable preparation process, high chromium carbide content, and strip shape precipitation in-situ self-generation manner.
Description
Technical field
The present invention relates to powder processing and metal coating layer material technical field, more particularly to a kind of compound hot spray powder and
Preparation method.
Background technology
The failure of modern industry parts is frequently experienced in the use surface of parts, therefore, at advanced surface
Reason technology (such as thermal spraying) prepares crucial coating in component surface or carries out coating reparation to failure surface, will largely
On meet requirement of the parts to different operating modes, improve the service life of parts.But enter one with modern manufacturing industry
Step development, the application operating mode of industrial part is also increasingly harsh, using the painting prepared by the metal or alloy material of single structure
Layer has been difficult to meet increasingly complicated wear-and corrosion-resistant demand.The ceramic-metal strengthened using ceramic phase to metal phase is compound
Material because simultaneously be compounded with ceramic phase high rigidity, high-melting-point, erosion-resisting and metal phase high tenacity, easy processing the characteristics of, because
This is widely used in automobile (such as piston ring), Aero-Space (such as undercarriage), metallurgical (such as sinking roller) and papermaking (such as watt
Stupefied roller) etc. in the industrial or civilian component having higher requirements anti-corrosion to surface abrasion resistance.Conventional ceramic reinforced metal composite
There are WC-Co, Cr3C2- NiCr etc., but due to WC classes ceramics, working condition understands oxidation Decomposition more than 550 DEG C, is not used to middle height
Thermal field is closed, and Cr3C2Although below 800 DEG C can retention property it is stable, metal phase NiCr performance can be with temperature liter
It is high and be decreased obviously.Therefore, for current parts thereof, such as the bent axle, air bleeding valve, work of large-scale heavy duty marine diesel engine
Plug ring etc., to the demand of wear and corrosion behavior, is needed badly under the conditions of high temperature and prepares a kind of new metal-ceramic composite wood
Material and respective coatings meet its requirement, improve its service life.
Prior art is in composite powder used by preparing ceramic reinforced metal composite coating, and ceramic phase is often using outer
Addition manner is added, and reunion sintering is carried out after typically directly being mixed by ceramic particle and metallic particles mixing or by both, this kind of
The composite powder uneven components added outside ceramic phase, the combination between ceramic phase and metal phase is poor, and ceramic phase is easily spraying
Disperse or degrade during painting, cause the problems such as spray deposited rate is low, coating performance is poor.Also, due to the ceramic phase of outer addition
Often using the ceramic particle with more arris, deposit in coating and tend to cause to grinding material in follow-up wear process
The excessive wear of material.
The content of the invention
It is an object of the invention to provide a kind of compound hot spray powder and preparation method, the powder sphericity is high, composition is equal
It is even, oxygen content is low, preparation flow is controllable, and chromium carbide content is high in powder, and is separated out in a manner of in-situ authigenic in strip.
A kind of compound hot spray powder, the main component included in the powder are：
2~7wt.% aluminium Al, 40~75wt.% chromium Cr, 0.1~0.3wt.% boron, 3~8wt.% carbon C,
Surplus is nickel；
And the granularity of the powder is：5~125 μm, main body granularity is 15~75 μm；The main body granularity refers to the granularity model
Enclose interior powder and account for more than 60%.
A kind of preparation method of compound hot spray powder, the preparation method include：
First by the mass ratio extraction raw material of setting；Wherein, included in the raw material extracted：2~7wt.% aluminium Al, 40
~75wt.% chromium Cr, 0.1~0.3wt.% boron, 3~8wt.% carbon C, surplus are nickel；
The raw material extracted is put into vacuum melting crucible, by the way of vacuum induction melting-inert gas atomizer
Obtain the Ni of chromium carbide in-situ authigenic enhancing3Al base alloy powders；
Shaking-sieving or air current classifying processing are carried out to resulting alloy powder, the increasing of chromium carbide in-situ authigenic is prepared
Strong Ni3The hot spray powder of Al based alloys.
The content of the in-situ authigenic chromium carbide obtained is 35~85vol.%；
And structure is Cr7C3、Cr3C2、Cr23C6In one or more be combined, be shaped as strip.
Boron in the raw material is the mixture of ni-b alloy, chromium-boron alloy or both；And the content of boron is 18 in alloy
~21wt.%.
The mode of the vacuum induction melting-inert gas atomizer is specially：
Heating refining is carried out to raw material first with intermediate frequency furnace, and vacuum≤10Pa in stove, heating rate is 5~20
DEG C/min, speed is will heat up after being warming up to 1360 DEG C and is down to 5~10 DEG C/min, and continuous heating is to 1600 DEG C~1700 DEG C,
Isothermal holding is then carried out, soaking time is 30~90min, and electromagnetic agitation, magnetic stirrer are carried out simultaneously in insulating process
3000~5000Hz of frequency, through tundish and leting slip a remark into atomization tank after raw alloy liquid is uniform；
Then make aluminium alloy atomization solidification by the way of inert gas atomizer, while separate out chromium carbide in-situ authigenic,
Obtain the N of chromium carbide in-situ authigenic enhancingi3Al base alloy powders.
A diameter of 2~the 8mm to let slip a remark, used inert atomizing gas are argon gas or nitrogen；
Atomizer is from folding and unfolding type ring seam nozzle, and atomization cone angle is 40~80 °, and atomizing pressure is 2.5~5MPa.
Methods described also includes：
Further use resulting chromium carbide in-situ self-generated reinforced Ni3The hot spray powder of Al based alloys is compound to prepare
Coating, used heat spraying method include but is not limited to plasma spray coating process or HVAF technique, wherein：
In plasma spray coating process：30~50Kw of spray power, 35~50l/min of argon flow amount, hydrogen flowing quantity 5~
9l/min, powder feeding 30~65g/min of rate, 100~140mm of spray distance；
In HVAF technique：22~30l/h of kerosene oil flow, 800~1000l/h of oxygen flow, powder feeding rate
45~80g/min, 350~400mm of spray distance.
The thickness of prepared composite coating is 0.1~1mm, and microhardness scope is Hv0.3500~Hv0.31100, with reference to
Strength range is 30~85MPa.
As seen from the above technical solution provided by the invention, the sphericity of the powder is high, composition is uniform, oxygen content
Low, preparation flow is controllable, and chromium carbide content is high in powder, and is separated out in a manner of in-situ authigenic in strip；And it can to prepare
The coating gone out combines excellent, has that hardness is high, coefficient of friction is low, wearability is good, corrosion-resistant anti-impact in the range of 25 DEG C~700 DEG C
The features such as losing function admirable.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Accompanying drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for this
For the those of ordinary skill in field, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is provided the preparation method schematic flow sheet of compound hot spray powder by the embodiment of the present invention.
Embodiment
With reference to the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Ground describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.Based on this
The embodiment of invention, the every other implementation that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example, belongs to protection scope of the present invention.
The embodiments of the invention provide a kind of compound hot spray powder, the main component included in the powder is：
2~7wt.% aluminium Al, 40~75wt.% chromium Cr, 0.1~0.3wt.% boron, 3~8wt.% carbon C,
Surplus is nickel；
And the granularity of the powder is：5~125 μm, main body granularity is 15~75 μm；Here, main body granularity refers to the grain
Powder accounts for more than 60% in the range of degree.
The embodiment of the present invention additionally provides a kind of preparation method of compound hot spray powder, real for the present invention as shown in Figure 1
The schematic flow sheet that example provides preparation method is applied, the preparation method includes：
Step 11：First by the mass ratio extraction raw material of setting；
In this step, included in the raw material extracted：2~7wt.% aluminium Al, 40~75wt.% chromium Cr, 0.1~
0.3wt.% boron, 3~8wt.% carbon C, surplus are nickel；
Boron in the raw material is the mixture of ni-b alloy, chromium-boron alloy or both；And the content of boron is 18 in alloy
~21wt.%.
Step 12：The raw material extracted is put into vacuum melting crucible, using vacuum induction melting-inert gas atomizer
Mode obtain chromium carbide in-situ authigenic enhancing Ni3Al base alloy powders；
In this step, the content of the in-situ authigenic chromium carbide obtained is 35~85vol.%；And structure is Cr7C3、
Cr3C2、Cr23C6In one or more be combined, be shaped as strip.
Here, the mode of above-mentioned vacuum induction melting-inert gas atomizer is specially：
Heating refining is carried out to raw material first with intermediate frequency furnace, and vacuum≤10Pa in stove, heating rate is 5~20
DEG C/min, speed is will heat up after being warming up to 1360 DEG C and is down to 5~10 DEG C/min, and continuous heating is to 1600 DEG C~1700 DEG C,
Isothermal holding is then carried out, soaking time is 30~90min, and electromagnetic agitation, magnetic stirrer are carried out simultaneously in insulating process
3000~5000Hz of frequency, through tundish and leting slip a remark into atomization tank after raw alloy liquid is uniform；
Then make aluminium alloy atomization solidification by the way of inert gas atomizer, while separate out chromium carbide in-situ authigenic,
Obtain the N of chromium carbide in-situ authigenic enhancingi3Al base alloy powders.
During specific implementation, the above-mentioned diameter let slip a remark can be 2~8mm, and used inert atomizing gas can be
Argon gas or nitrogen；Atomizer is from folding and unfolding type ring seam nozzle, and atomization cone angle is 40~80 °, and atomizing pressure is 2.5~5MPa.
Step 13：Shaking-sieving or air current classifying processing are carried out to resulting alloy powder, chromium carbide original is prepared
Position self-generated reinforced Ni3The hot spray powder of Al based alloys.
In addition, obtaining above-mentioned chromium carbide in-situ self-generated reinforced Ni3After the hot spray powder of Al based alloys, further also
Composite coating can be prepared using resulting hot spray powder, used heat spraying method includes but is not limited to plasma
Spraying coating process or HVAF technique, wherein：
In plasma spray coating process：30~50Kw of spray power, 35~50l/min of argon flow amount, hydrogen flowing quantity 5~
9l/min, powder feeding 30~65g/min of rate, 100~140mm of spray distance；
In HVAF technique：22~30l/h of kerosene oil flow, 800~1000l/h of oxygen flow, powder feeding rate
45~80g/min, 350~400mm of spray distance.
The thickness of finally obtained composite coating can be 0.1~1mm, and microhardness may range from Hv0.3500~
Hv0.31100, bond strength may range from 30~85MPa.
The preparation process of above-mentioned hot spray powder and composite coating is described in detail with reference to instantiation：
Example 1, take raw material, aluminium Al by following mass ratio first：5.2wt.%, chromium Cr：55.3wt.%, boron：
0.21wt.%, carbon C：5.0wt.%, nickel:Surplus；And nickel plate, ni-b alloy block, chromium are sequentially placed into vacuum melting crucible
Block, graphite block.
Then heating refining is carried out to raw material using intermediate frequency furnace, vacuum 9.6Pa in stove, heating rate is 15 DEG C/
Min, speed is will heat up after being warming up to 1360 DEG C and is down to 7 DEG C/min, and continuous heating then carries out isothermal holding to 1650 DEG C,
Soaking time is 45min, magnetic stirrer frequency 4000Hz, and during which substep addition aluminium block carries out melting；
Resulting aluminium alloy carries out high pressure argon gas atomization through tundish and in leting slip a remark into atomization tank, lets slip a remark a diameter of
4mm, atomization cone angle are 60 °, atomizing pressure 3.5MPa.Air current classifying processing is carried out to powder after atomization, obtains chromium carbide original
Position self-generated reinforced Ni3The compound hot spray powder of Al based alloys, and the particle diameter distribution of the powder is：10~105 μm.
Gained powder sphericity is high, and oxygen content is low, is 400ppm, and chromium carbide is strip in powder, is evenly distributed, content
For 63vol.%.
Further, using the above-mentioned obtained chromium carbide in-situ self-generated reinforced Ni of HVAF3Al based alloys
Composite powder, prepare chromium carbide in-situ self-generated reinforced Ni3The composite coating of Al based alloys, specific spraying parameter are：
Kerosene oil flow 26l/h, oxygen flow 900l/h, powder feeding rate 50g/min, spray distance 380mm.
Final prepared coating structure even compact, coating room temperature microhardness is Hv0.31011.1 bond strength
80.24MPa, microhardness Hv at 700 DEG C1755.6。
Example 2, take raw material, aluminium Al by following mass ratio first：3.8wt.%, chromium Cr：66.8wt.%, boron：
0.23wt.%, carbon C：6.0wt.%, nickel:Surplus；And nickel plate, ni-b alloy block, chromium are sequentially placed into vacuum melting crucible
Block, graphite block.
Then heating refining is carried out to raw material using intermediate frequency furnace, vacuum 9.7Pa in stove, heating rate is 15 DEG C/
Min, speed is will heat up after being warming up to 1360 DEG C and is down to 7 DEG C/min, and continuous heating, to 1670 DEG C, soaking time 20 minutes is electric
Magnetic stirrer frequency 5000Hz, during which substep addition aluminium block carry out melting；
Resulting aluminium alloy carries out high pressure argon gas atomization through tundish and in leting slip a remark into atomization tank, lets slip a remark a diameter of
5mm, atomization cone angle are 65 °, atomizing pressure 4.0MPa.Powder after atomization is carried out to shake sieve classification processing, is carbonized
Chromium in-situ self-generated reinforced Ni3The compound hot spray powder of Al based alloys, and powder diameter is distributed as：15~115 μm.
Gained powder sphericity is high, and oxygen content is low, is 450ppm, and chromium carbide is strip in powder, is evenly distributed, content
For 76vol.%.
Further, using the above-mentioned obtained chromium carbide in-situ self-generated reinforced Ni of HVAF3Al based alloys
Composite powder, prepare chromium carbide in-situ self-generated reinforced Ni3The composite coating of Al based alloys, specific spraying parameter are：
Kerosene oil flow 28l/h, oxygen flow 950l/h, powder feeding rate 45g/min, spray distance 370mm.
Final prepared coating structure even compact, coating room temperature microhardness is Hv0.31031.4 bond strength
79.76MPa, microhardness Hv at 700 DEG C1799.6。
Chromium carbide in-situ self-generated reinforced Ni as shown in table 1 below prepared by example 1,23The composite coating of Al based alloys with
Existing commercial Cr3C2- NiCr coatings microhardness (Hv in the range of 25~700 DEG C1) contrast：
Table 1
Chromium carbide in-situ self-generated reinforced Ni as shown in table 2 below prepared by example 1,23The composite coating of Al based alloys with
Existing commercial Cr3C2- NiCr coatings are in terms of coefficient of friction and wearability (including itself wear extent and wear extent to mill part)
Contrast：
Table 2
Wherein, friction and wear test is using GermanyIV high temperature reciprocating friction abrasion testers, coating are in perpetual motion
Sample, it is static lower sample to mill part, test load 100N, frequency 50Hz, stroke 2mm, wearing- in period 30min,
Temperature is respectively normal temperature, 300 DEG C, 600 DEG C.Normal temperature and 300 DEG C of tests are gray cast iron to mill part, and 600 DEG C of tests are 304 to mill part
Stainless steel.
From above-mentioned contrast：The microhardness scope of this coating is Hv0.3500~Hv0.31100, bond strength scope
For 30~85MPa, there is excellent antifriction, wear-resisting, anti-corrosion and scour resistance, available for 25~800 DEG C of scope inner antifrictions, resistance to
The occasions such as mill, anti-corrosion, antiscour.
In summary, the sphericity of powder described in the embodiment of the present invention is high, composition is uniform, oxygen content is low, and preparation flow can
Control, chromium carbide content is high in powder, and is separated out in a manner of in-situ authigenic in strip；And the coating that can to prepare is with reference to excellent
It is good, there is the spies such as hardness is high, coefficient of friction is low, wearability is good, corrosion-resistant anti-erosion property is excellent in the range of 25 DEG C~700 DEG C
Point.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art is in the technical scope of present disclosure, the change or replacement that can readily occur in,
It should all be included within the scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Enclose and be defined.
Claims (5)
1. a kind of preparation method of compound hot spray powder, it is characterised in that the preparation method includes：
First by the mass ratio extraction raw material of setting；Wherein, included in the raw material extracted：2~7wt.% aluminium Al, 40~
75wt.% chromium Cr, 0.1~0.3wt.% boron, 3~8wt.% carbon C, surplus are nickel；Boron in the raw material is nickel
The mixture of boron alloy, chromium-boron alloy or both；And the content of boron is 18~21wt.% in alloy；
The raw material extracted is put into vacuum melting crucible, obtained by the way of vacuum induction melting-inert gas atomizer
The Ni of chromium carbide in-situ authigenic enhancing3Al base alloy powders；Wherein, the content of the in-situ authigenic chromium carbide obtained be 35~
85vol.%；And structure is Cr7C3、Cr3C2、Cr23C6In one or more be combined, be shaped as strip；
Shaking-sieving or air current classifying processing are carried out to resulting alloy powder, the enhancing of chromium carbide in-situ authigenic is prepared
Ni3The hot spray powder of Al based alloys, and the granularity of the powder is：5~125 μm, main body granularity is 15~75 μm；The master
Body granularity refers to powder in the particle size range and accounts for more than 60%.
2. the preparation method of compound hot spray powder as claimed in claim 1, it is characterised in that the vacuum induction melting-lazy
The mode of property gas atomization is specially：
Heating refining is carried out to raw material first with intermediate frequency furnace, vacuum≤10Pa in stove, heating rate is 5~20 DEG C/
Min, speed is will heat up after being warming up to 1360 DEG C and is down to 5~10 DEG C/min, and continuous heating is to 1600 DEG C~1700 DEG C, then
Isothermal holding is carried out, soaking time is 30~90min, and electromagnetic agitation, magnetic stirrer frequency are carried out simultaneously in insulating process
3000~5000Hz, through tundish and leting slip a remark into atomization tank after raw alloy liquid is uniform；
Then make aluminium alloy atomization solidification by the way of inert gas atomizer, while separate out chromium carbide in-situ authigenic, obtain
The Ni of chromium carbide in-situ authigenic enhancing3Al base alloy powders.
3. the preparation method of compound hot spray powder as claimed in claim 2, it is characterised in that
A diameter of 2~the 8mm to let slip a remark, used inert atomizing gas are argon gas or nitrogen；
Atomizer is from folding and unfolding type ring seam nozzle, and atomization cone angle is 40~80 °, and atomizing pressure is 2.5~5MPa.
4. the preparation method of compound hot spray powder as claimed in claim 1, it is characterised in that methods described also includes：
Further use resulting chromium carbide in-situ self-generated reinforced Ni3The hot spray powders of Al based alloys prepares composite coating,
Used heat spraying method includes but is not limited to plasma spray coating process or HVAF technique, wherein：
In plasma spray coating process：30~50kW of spray power, 35~50L/min of argon flow amount, 5~9L/ of hydrogen flowing quantity
Min, powder feeding 30~65g/min of rate, 100~140mm of spray distance；
In HVAF technique：22~30L/h of kerosene oil flow, 800~1000L/h of oxygen flow, powder feeding rate 45~
80g/min, 350~400mm of spray distance.
5. the preparation method of compound hot spray powder as claimed in claim 4, it is characterised in that
The thickness of prepared composite coating is 0.1~1mm, and microhardness scope is Hv0.3500~Hv0.31100, bond strength
Scope is 30~85MPa.
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| CN106399900A (en) * | 2016-11-18 | 2017-02-15 | 无锡明盛纺织机械有限公司 | Method for spraying aluminum alloy with Si-Cr-B-W-Al wear-resisting coating through high velocity oxy fuel |
| CN106825592A (en) * | 2016-12-22 | 2017-06-13 | 广州市尤特新材料有限公司 | A kind of preparation method of the alloy powder for cold spraying |
| CN109112436B (en) * | 2018-10-10 | 2020-07-31 | 北京科技大学 | Method for in-situ generation of fiber-reinforced high-temperature alloy composite material |
| TWI680209B (en) * | 2018-12-28 | 2019-12-21 | 財團法人工業技術研究院 | Multicomponent alloy coating |
| CN115537683B (en) * | 2021-06-30 | 2024-03-12 | 叶均蔚 | High-strength corrosion-resistant ferrochrome block and application thereof |
| CN115011843A (en) * | 2022-04-15 | 2022-09-06 | 钢铁研究总院有限公司 | In-situ authigenic carbide reinforced Ni3 Al-based alloy powder and laser cladding method and application thereof |
| CN115401195A (en) * | 2022-09-13 | 2022-11-29 | 中国化学工程第十一建设有限公司 | Particle-reinforced high-entropy alloy powder and preparation method and application thereof |
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| CN1498984A (en) * | 2002-11-07 | 2004-05-26 | 财团法人工业技术研究院 | Multi-element alloy coat |
| CN102586710A (en) * | 2012-03-11 | 2012-07-18 | 赣州章源钨业新材料有限公司 | Novel Cr3C2-NiCr thermal spraying powder and preparation process thereof |
| CN104918733A (en) * | 2013-01-24 | 2015-09-16 | H.C.施塔克股份有限公司 | Thermal spray powder for sliding systems which are subject to heavy loads |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1498984A (en) * | 2002-11-07 | 2004-05-26 | 财团法人工业技术研究院 | Multi-element alloy coat |
| CN102586710A (en) * | 2012-03-11 | 2012-07-18 | 赣州章源钨业新材料有限公司 | Novel Cr3C2-NiCr thermal spraying powder and preparation process thereof |
| CN104918733A (en) * | 2013-01-24 | 2015-09-16 | H.C.施塔克股份有限公司 | Thermal spray powder for sliding systems which are subject to heavy loads |
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